Product picture - Otto Engineering 1-Wire Monitoring Kit with In-Line PTT, Microphone & Quick Disconnect Tube for Motorola XPR 3300 3500 Series 2-Way Radios Otto, Engineering, 1-Wire, Monitoring, Kit, with, In-Line, PTT, Microphone, &, Quick, Disconnect, Tube, Motorola, XPR, 3300, 3500, Series, 2-Way, Radios Click the image to close this page